单项选择题
A.up B.on C.high D.upwards
The captain is not on（）.A.aboardB.boardC.boardingD.asho...
单项选择题The captain is not on（）.
A.aboard B.board C.boarding D.ashore
May I （）a look around your ship?A.hasB.hadC.haveD.havin...
单项选择题May I （）a look around your ship?
A.has B.had C.have D.having
It is very important for a sailor to （）a safety patrol....
单项选择题It is very important for a sailor to （）a safety patrol.
